Network Models

Aug 11, 2012

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Network Models. Objectives. Learn how data logically travels between sending and receiving hosts. Explain common TCP and UDP ports, protocols, and their purpose. How Data is Transmitted on a Network? yt video 13:00. Before data is transmitted on a network:.

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Network Models

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Network Models

Network Models. Robert Zimmer Room 6, 25 St James. Introduction to Network Modeling . General Problems in Network Modeling Transportation Problems Assignment Problems Minimum Cost Flow Problems Shortest Path Problems Maximum Flow Problems Critical Path in Project Plan Networks.

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Network Models

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Network Models

Network Models. Lecture 18 The Transportation Algorithm II. The Initialized Transportation Simplex Tableau. LCSP. Recall at the end of the last lecture we had initialized the Transportation Simplex Tableau starting from the results of the Least Cost Starting Procedure.

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Network Models

Network Models. Lecture 17 (Part l.) The Least Cost Starting Procedure. The Least Cost Starting Procedure. Starting with the least expensive Flow, we fill in as much flow for that Decision Variable, Xij, as possible.

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Network Models

Network Models. Lecture 17 (Part v.) Vogel’s Approximation Method. Vogel’s Approximation Starting Procedure. Calculate Row and Column Penalties by taking the absolute value of the two lowest “available” costs in the row or column deducted from one another.

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Network Models

Network Models. Lecture 17 (part n.) The Northwest Corner Method. The NorthWest Corner Method. Starting from the Top Left (NorthWest Corner) of the Transportation Tableau, we will fill in as much Flow for each Decision Variable, Xij, as possible.

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Network Models

Network Models. Part 2. Maximal flow algorithm. In a maximal flow problem, we seek to find the maximum volume of flow from a source node to terminal sink node in a capacitated network. Maximum flow algorithm is straightforward. How it works.

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Network Models

Network Models. Robert Zimmer Room 6, 25 St James. Introduction to Network Modeling. General Problems in Network Modeling Transportation Problems Assignment Problems Minimum Cost Flow Problems Shortest Path Problems Maximum Flow Problems Critical Path in Project Plan Networks.

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Network Models

Network Models. Part 1. Network Models. There is a many of operation research situation is modeled and solved as network ( nodes can connected by branches) There are five network models algorithms 1- Minimal spanning tree 2- shortest-route algorithms 3- maximum-flow algorithms

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Kingdom of Saudi Arabia Prince Norah bint Abdul Rahman University College of Computer Since and Information System NET331. Network Models. T.Najah Al_Subaie. Chapter 2. LAYERED TASKS OSI Model TCP/IP Model. Layered Tasks.

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Network (graph) Models. Lecture 6. What is a network (graph) model?. Network models. We will cover the following network models: Erdos–Renyi random graphs Generalized random graphs (with the same degree distribution as the data networks) Small-world networks Scale-free networks

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Network Models

Network Models. 1. Transportation Problem (TP). Distributing any commodity from any group of supply centers, called sources , to any group of receiving centers, called destinations , in such a way as to minimize the total distribution cost (shipping cost). 1. Transportation Problem (TP).

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Network Models

Network Models. Please carefully study the following examples: Transportation problem - section 3.11 and 5.4 Transshipment problem - section 5.1 Shortest path problem - section 5.2 Maximal flow problem - section 5.6 Minimal spanning tree problem - section 5.8 Suggested problems:

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Network Models

Network Models. 1.1 LAYERED TASKS. We use the concept of layers in our daily life. As an example, let us consider two friends who communicate through postal mail. The process of sending a letter to a friend would be complex if there were no services available from the post office.

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